$ git clone -n https://src.fedoraproject.org/rpms/gmailctl.git /var/lib/mock/f39-build-2168387-50999/root/chroot_tmpdir/scmroot/gmailctl
Cloning into '/var/lib/mock/f39-build-2168387-50999/root/chroot_tmpdir/scmroot/gmailctl'...
$ git fetch origin 3a5fed16e98464eb7c36930e36ffe10ae67cf35d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gmailctl
 * [new ref]         3a5fed16e98464eb7c36930e36ffe10ae67cf35d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a5fed1 upgrade to v0.10.7, close rhbz#2249798