$ git clone -n https://src.fedoraproject.org/rpms/rust-rcgen.git /var/lib/mock/f41-build-side-1-2973930-35834/root/chroot_tmpdir/scmroot/rust-rcgen
Cloning into '/var/lib/mock/f41-build-side-1-2973930-35834/root/chroot_tmpdir/scmroot/rust-rcgen'...
$ git fetch origin 95a62cf7e34a71ac9c10d7a749cdbbc74ecb0c90:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rcgen
 * [new ref]         95a62cf7e34a71ac9c10d7a749cdbbc74ecb0c90 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 95a62cf Initial import (#2312228)