$ git clone -n https://src.fedoraproject.org/rpms/rust-rustls-pemfile.git /var/lib/mock/f40-build-2063573-49167/root/chroot_tmpdir/scmroot/rust-rustls-pemfile
Cloning into '/var/lib/mock/f40-build-2063573-49167/root/chroot_tmpdir/scmroot/rust-rustls-pemfile'...
$ git fetch origin 5bc27891ffd8aa035e7a5c0dd226de5650b37466:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rustls-pemfile
 * [new ref]         5bc27891ffd8aa035e7a5c0dd226de5650b37466 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5bc2789 Update to version 1.0.4; Fixes RHBZ#2248942