$ git clone -n https://src.fedoraproject.org/rpms/rust-glib-sys.git /var/lib/mock/f39-build-1624709-39089/root/chroot_tmpdir/scmroot/rust-glib-sys
Cloning into '/var/lib/mock/f39-build-1624709-39089/root/chroot_tmpdir/scmroot/rust-glib-sys'...
$ git fetch origin 48b8dbec5dafd1c6747466b69b91b2b681dc3e08:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glib-sys
 * [new ref]         48b8dbec5dafd1c6747466b69b91b2b681dc3e08 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48b8dbe Update to version 0.18.1; Fixes RHBZ#2224910