$ git clone -n https://src.fedoraproject.org/rpms/rust-glib.git /var/lib/mock/f45-build-42055-788/root/chroot_tmpdir/scmroot/rust-glib
Cloning into '/var/lib/mock/f45-build-42055-788/root/chroot_tmpdir/scmroot/rust-glib'...
$ git fetch origin a7ea646827af7fc91cd188b38a4c774fbb582bed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glib
 * [new ref]         a7ea646827af7fc91cd188b38a4c774fbb582bed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a7ea646 Expose v2_90 feature