$ git clone -n https://src.fedoraproject.org/rpms/golang-github-theupdateframework-notary.git /var/lib/mock/f39-build-2322095-58585/root/chroot_tmpdir/scmroot/golang-github-theupdateframework-notary
Cloning into '/var/lib/mock/f39-build-2322095-58585/root/chroot_tmpdir/scmroot/golang-github-theupdateframework-notary'...
warning: unable to unlink '/var/lib/mock/f39-build-2322095-58585/root/chroot_tmpdir/scmroot/golang-github-theupdateframework-notary/.git/config.lock': Read-only file system
error: could not write config file /var/lib/mock/f39-build-2322095-58585/root/chroot_tmpdir/scmroot/golang-github-theupdateframework-notary/.git/config: Read-only file system
fatal: could not set 'core.filemode' to 'true'