$ git clone -n https://src.fedoraproject.org/rpms/NetworkManager.git /var/lib/mock/f39-build-1844510-42055/root/chroot_tmpdir/scmroot/NetworkManager
Cloning into '/var/lib/mock/f39-build-1844510-42055/root/chroot_tmpdir/scmroot/NetworkManager'...
$ git fetch origin cf06e13d4b7e5003a659c971f13e7821f5bf9f04:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/NetworkManager
 * [new ref]         cf06e13d4b7e5003a659c971f13e7821f5bf9f04 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf06e13 spec: update spec file and "readme-ifcfg-rh.txt"