$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-command.git /var/lib/mock/f45-build-41912-786/root/chroot_tmpdir/scmroot/rust-gix-command
Cloning into '/var/lib/mock/f45-build-41912-786/root/chroot_tmpdir/scmroot/rust-gix-command'...
$ git fetch origin 12cbe90e46e20556eb9104002c5841efe5d4ab24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-command
 * [new ref]         12cbe90e46e20556eb9104002c5841efe5d4ab24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12cbe90 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild